The health overhaul that President Barack Obama signed into law in 2010 originally would've made states expand Medicaid to people earning up to 138 percent of the federal poverty level. But the U.S. Supreme Court said in 2012 that expansion is optional.

Mississippi has rejected Medicaid expansion because Republican Gov. Phil Bryant and leaders of the Republican-controlled Legislature say the state can't afford it, even with the federal government paying most of the tab.